Fix stack.yaml

.travis.yml

@@ -64,8 +64,8 @@ matrix:
   ##### OSX test via stack #####
 
   # Build on macOS in addition to Linux
-  - env: BUILD=stack ARGS=""
-    compiler: ": #stack default osx"
+  - env: BUILD=stack ARGS="--stack-yaml stack-8.2.2.yaml"
+    compiler: ": #stack 8.2.2 osx"
     os: osx
 
   ##### CABAL #####

stack-8.0.2.yaml

@@ -2,7 +2,7 @@ resolver: lts-9.0
 
 extra-deps:
   - monad-memo-0.4.1
-  - czipwith-1.0.0.0
+  - czipwith-1.0.1.0
   - butcher-1.3.0.0
   - data-tree-print-0.1.0.0
   - deque-0.2

stack-8.2.2.yaml

@@ -0,0 +1,7 @@
+resolver: lts-11.1
+
+extra-deps:
+  - czipwith-1.0.1.0
+
+packages:
+  - .

stack.yaml

@@ -1,4 +1,7 @@
 resolver: lts-11.1
 
+extra-deps:
+  - czipwith-1.0.1.0
+
 packages:
   - .